This is an article written to display or to present about how to use qcow2 image file on Virtualbox. Basically, qcow2 image as far as I know it cannot be used directly to be started or to be booted when the qcow2 image itself is basically an operating system image. To be able to use it, first of all, the qcow2 image needs to be converted. Virtualbox can start or can boot image in the vdi file format. In order for a qcow2 file image can be utilized in the Virtualbox, these steps below must be executed properly :

1. Convert the qcow2 file image. Below is how to convert the file before it can be used in Virtualbox :

qemu-img convert -f qcow2 qcow2_file_name -O vdi vdi_file_name

The command pattern above which is used to convert file image from qcow2 format into vdi format can be executed in a real situation as follows :

This article is written to show step by step on how to create a new instance in Openstack virtualization technology platform. It is done, the process to create new instance via Openstack Dashboard. The process itself can be started after all the preparation on installing Openstack has already finished with the Openstack Dashboard is alive and can be accessed. The steps are shown below :

1. Login to the Openstack Dashboard. The login process can actually be read in the following article titled ‘How to Access and Login to Openstack Dashboard Page’ in this link.

2. After successfully login in the Openstack Dashboard, the display of its main page is shown below :

This is an article which is tightly related with the management of virtual server using Openstack as its virtualization technology platform or framework. In this article as shown in the title, the focus is on one of the function which can be performed through the Openstack Dashboard as the tool used to manage virtual server, it is about how to create network port in Openstack for virtual server itself.

As it has already known that every server, either it is physical or virtual, it has the same concept of having a network interface attached to it. So, in order to virtually add or giving the virtual server a virtual network interface, it must be created in the first place. This article is showing on how to create a network interface or in the term of Openstack Dashboard, it is a network port. Below are steps taken in order to create a network interface or a network port :

As seen in the title of this article, the content or the material which is going to be discussed in this article is specifically point out or focus on to explain how to access and login to Openstack Dashboard page.

Being as a virtualization technology platform or a framework specializing on how to manage virtual cloud operating system either private or public, Openstack is one of the popular platform or framework to be able to perform and to be chosen to achieve that purpose.

So, Openstack itself actually has its own Dashboard which can be accessed using any types of web browser since it is actually made in a web-based platform.

The most important thing to be done is to make sure that Openstack has already been installed and the feature for permitting access via Openstack Dashboard has also already been installed.

An article in this context is written to discuss about an error triggered at the time virtual machine manager is being executed. An error which is triggered is already stated in the title of this article where it is “Failed to acquire pid file ‘/var/run/libvirtd.pid’ : Resource temporary unavailable”. The error itself is simply stated in the following output generated by the command execution :